Derivative Instruments and Hedging Activities Disclosure [Text Block] | DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risk, including interest rate, liquidity and credit risk primarily by managing the amount, sources and duration of its debt funding and, to a limited extent, the use of derivative instruments. Specifically, the Company has entered into derivative instruments to manage exposures that arise from business activities that result in the payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company's derivative instruments, described below, are used to manage differences in the amount, timing and duration of the Company's known or expected cash payments principally related to certain of the Company's borrowings. The Company's objective in using interest rate derivatives is to manage exposure to interest rate movements and add stability to interest expense. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. As of June 30, 2015 , the Company had five interest rate swaps outstanding, all of which are used to hedge the variable cash flows associated with unsecured loans. The Company executed an $80,000,000 interest rate swap associated with an $80,000,000 unsecured loan during the third quarter of 2012. During the third quarter of 2013, the Company entered into two forward starting interest rate swaps totaling $75,000,000 which are hedging an unsecured loan which closed in December 2013. During the third quarter of 2014, the Company executed a $75,000,000 interest rate swap associated with a $75,000,000 unsecured loan. During the first quarter of 2015, EastGroup executed a $75,000,000 interest rate swap associated with a $75,000,000 unsecured loan. All of the aforementioned interest rate swaps convert the related loans' LIBOR rate components to fixed interest rates for the entire terms of the loans, and the Company has concluded that each of the hedging relationships is highly effective. The effective portion of changes in the fair value of derivatives designated and qualifying as cash flow hedges is recorded in Other Comprehensive Income (Loss) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The ineffective portion of the change in fair value of the derivatives, which is immaterial for the periods reported, is recognized directly in earnings (included in Other on the Consolidated Statements of Income and Comprehensive Income). Amounts reported in Other Comprehensive Income (Loss) related to derivatives will be reclassified to Interest Expense as interest payments are made on the Company's variable-rate debt. The Company estimates that an additional $3,810,000 will be reclassified from Other Comprehensive Income (Loss) as an increase to Interest Expense over the next twelve months. The Company's valuation methodology for over-the-counter (“OTC”) derivatives is to discount cash flows based on Overnight Index Swap (“OIS”) rates. Uncollateralized or partially-collateralized trades are discounted at OIS, but include appropriate economic adjustments for funding costs (i.e., a LIBOR-OIS basis adjustment to approximate uncollateralized cost of funds) and credit risk. As of January 15, 2015, the Company began calculating its derivative valuations using mid-market prices; prior to that date, the Company used bid-market prices. The change in valuation methodology is considered a change in accounting estimate and is the result of recent developments in the marketplace. Management has assessed the impact of the change for all periods presented and has deemed the impact to be immaterial. As of June 30, 2015 and December 31, 2014 , the Company had the following outstanding interest rate derivatives that are designated as cash flow hedges of interest rate risk: Interest Rate Derivative Notional Amount as of June 30, 2015 Notional Amount as of December 31, 2014 (In thousands) Interest Rate Swap $80,000 $80,000 Interest Rate Swap $75,000 $75,000 Interest Rate Swap $75,000 — Interest Rate Swap $60,000 $60,000 Interest Rate Swap $15,000 $15,000 The table below presents the fair value of the Company's derivative financial instruments as well as their classification on the Consolidated Balance Sheets as of June 30, 2015 and December 31, 2014 . See Note 18 for additional information on the fair value of the Company's interest rate swaps. Derivatives As of June 30, 2015 Derivatives As of December 31, 2014 Balance Sheet Location Fair Value Balance Sheet Location Fair Value (In thousands) Derivatives designated as cash flow hedges: Interest rate swap assets Other Assets $ 1,585 Other Assets $ 812 Interest rate swap liabilities Other Liabilities 3,479 Other Liabilities 3,314 The table below presents the effect of the Company's derivative financial instruments on the Consolidated Statements of Income and Comprehensive Income for the three and six months ended June 30, 2015 and 2014: Three Months Ended Six Months Ended June 30, 2015 2014 2015 2014 (In thousands) DERIVATIVES IN CASH FLOW HEDGING RELATIONSHIPS Interest Rate Swaps: Amount of income (loss) recognized in Other Comprehensive Income (Loss) on derivatives $ 2,006 (2,321 ) (1,462 ) (3,922 ) Amount of loss reclassified from Accumulated Other Comprehensive Loss into Interest Expense (1,116 ) (581 ) (2,049 ) (1,145 ) See Note 12 for additional information on the Company's Accumulated Other Comprehensive Loss resulting from its interest rate swaps. Derivative financial agreements expose the Company to credit risk in the event of non-performance by the counterparties under the terms of the interest rate hedge agreements. The Company believes it minimizes the credit risk by transacting with financial institutions the Company regards as credit-worthy. The Company has an agreement with its derivative counterparties containing a provision stating that the Company could be declared in default on its derivative obligations if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender. As of June 30, 2015 , the fair value of derivatives in an asset position related to these agreements was $1,585,000 , and the fair value of derivatives in a liability position related to these agreements was $3,479,000 . If the Company breached any of the contractual provisions of the derivative contracts, it could be required to settle its obligation under the agreements at the swap termination value. As of June 30, 2015 , the swap termination value of derivatives in an asset position was an asset in the amount of $1,631,000 , and the swap termination value of derivatives in a liability position was a liability in the amount of $3,517,000 . |